Dear coworkers,
my questions are about HRLDAS. I am runing HRLDAS with GLDAS-based forcing data.
For running offline LSM such HRLDAS, we know we need atmospheric forcing and initial data.
In case of HRLDAS, we need forcing data such as
Rainf/ Snowf/ Wind/ Tair/ Qair/ Psurf/ SWdown/ LWdown/ SWdown24/ Precip/ U/ V/
and initial data such as
SWE/ Canopint/ AvgSurfT/ SoilM/ Tsoil
from Reanalysis data or other land assimilation data. (my case, GLDAS)
My question in this step is, why it need combine_precipitation and hourly interpolation of solar radiation?
I mean, from forcing data, we extracted snow and rain separately, but next step is to combine them as a precipitation. Is there any reason for this?
And why should we need to do hourly interpolation of solar radiation via zenith angle using 3hrly solar radiation? why only this parameter?
Thanks for time and for reading my question!
Thanks in advance.
Arim
My email if necessary : [email protected]
@kaushik Ghosal
Thank you!
Yes, I read the guide already, but it doesn't have any specific reason why HRLDAS need to interpolate Solar radiation hourly and combine snow and rain into one precipitation. Do we need to do this for any physical reason?
I am wondering why we need this steps to run HRLDAS.
Thank you for answering though!
Well,
Synoptic data are incorporated at the appropriate times. The snow model is reinitialized with the assimilated snow observations to generate a variety of snow products that combine to form National Snow Analyses. The data incorporate all of the available information necessary and available to produce a "best estimate" of real-time snow cover conditions at an area spatial resolution and target temporal resolution for the country.
Regards
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